Abstract #1272

Joint Reconstruction of Simultaneous PET/MR Imaging with Motion Correction Using a B-spline Motion Model

Junshen Xu¹, Yibo Zhao¹, and Kui Ying²

¹Department of Engineering Physics, Tsinghua University, Beijing, People's Republic of China, ²Key Laboratory of Particle and Radiation Imaging, Ministry of Education, Medical Physics and Engineering Institute, Department of Engineering Physics, Tsinghua University, Beijing, People's Republic of China

Joint Reconstruction (JR) is an important approach to utilize the similarity of PET and MRI in simultaneous PET/MR imaging. For now, almost all the JR models ignore the effect of motion during scan, leading to blurring in images. We propose a motion correction method under the framework of JR, assuming that PET images and MRI images share exactly the same motion field and using a B-spline free deformation model to describe the motion. Both simulation and patient study show that the proposed method can reduce the blurring caused by motion in PET and MR images.

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